Six crates(a, b,c, d,e, f) at rest on level surfaces. The crates have differentmasses and the frictional coefficients [given as(μs,μk)] between the crates and the surfaces differ. Thesame external force is applied to each crate, but none of thecrates move.

Rank the crates on the basis of thefrictional force acting on them.
Rank from largest to smallest.

a. [500kg μ=(0.6,0.3)]

b. [750kg μ=(0.4,0.3) ]

c. [250kg μ=(0.2,0.1)]

d.[600kg μ=(0.8,0.5)]

e.[750kg μ=(0.6,0.5)]

f. [1500kg μ=(0.3,0.1) ]

Idon’t quite understand this problem

Arrange the images in order to show how lake-effect snow occurs.

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s